| 摘要 |
An internal combustion engine ( 1 ) causes an air/fuel mixture in a cylinder to combust due to ignition by a spark plug ( 14 ). The engine controller ( 50 ) calculates a crank angle at knock on the basis of an operating state of the engine ( 1 ) ( 53 - 54 ), calculates a knock intensity on the basis of this crank angle at knock ( 54 ), calculates a limit ignition timing at which knock is not generated, on the basis of the knock intensity ( 54 ), and controls the ignition timing of the spark plug ( 14 ) to the limit ignition timing at which knock is not generated ( 55 ). Therefore, suitable control of the ignition timing is achieved, by means of a small number of adaptation steps.
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